/Engine/Plugins/Experimental/PCG/Source/PCG/Public/Metadata/PCGMetadata.h
Metadata chaining mechanism
[PCGMetadataEntryKey](API\Plugins\PCG\Metadata\PCGMetadataEntryKey) GetParentKey ( [PCGMetadataEntryKey](API\Plugins\PCG\Metadata\PCGMetadataEntryKey) LocalItemKey ) const